Emc IP Holding Company LLC

Xiangqing Yang

Ren Ren

Wei Zhang

Wei Lin

Colin Yong Zou

Gang Cao

Man Lv

Timothy C Ng

Milind M Koli

Walter Wang

Matt Zhu Zhang

Xi Ma

Yin Zhu

A method performed by a mapping driver executing on a DSS includes (a) receiving a data storage command that identifies a portion of storage of the DSS having a given size to which the data storage command is directed, (b) generating a plurality of derived data storage (DDS) instructions from the received data storage command, each DDS instruction of the plurality of DDS instructions identifying a respective sub-portion of the portion to which that DDS instruction is directed, each sub-portion having a respective sub-portion size smaller than the given size, and (c) issuing each DDS instruction separately to a data storage coordination driver also executing on the DSS, the data storage coordination driver being configured to cause each DDS instruction to be performed with respect to storage of the DSS. An apparatus, system, and computer program product for performing a similar method are also provided.

Techniques for splitting up I/O commands in a data storage system

Embodiments of the present disclosure provide a method of analyzing data in a storage system, a storage system, and a computer program product. The method includes: in response to detecting a request for a data analytic job, obtaining target data for the data analytic job from a first storage device of the storage system. The method also includes storing the target data into a second storage device of the storage system that is assigned for data analysis, and performing the data analytic job using a data processing device and the second storage device in the storage system.

Data analysis in storage system

Embodiments of the present disclosure provide a method and apparatus for assigning lock resources to objects by obtaining a first alternative lock for the object, and determining first correlations between the object and each of one or more other objects when the first alternative lock has been assigned to the one or more other objects, wherein in response to determining that each of the first correlations is lower than a predetermined threshold, assign the first alternative lock to the object, and may maximize the possibility of parallel execution and reduce the time waiting for lock resources, thereby avoiding lock contention.

Assigning lock resources to objects

Various embodiments of the present invention relate to a method and apparatus for data copy. Specifically, in one embodiment of the present invention there is provided a method for data copy, comprising: obtaining a data source on which data copy is to be executed; determining a size P of a block extent based on which the data source is divided; dividing the data source into at least one data block based on the size P of the block extent; and copying data from the data source to a data target in the basic unit of the at least one data block; wherein the size P of the block extent is an integral multiple of a size R of a read/write unit supported by underlying architecture. In one embodiment of the present invention, there is provided an apparatus for data copy.

Method and apparatus for efficient data copying and data migration

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Shanghai, China

Xiangqing Yang